Tests setup in Docker

[gaurijo]

This PR handles building a docker image for the book-tracker tests and running docker compose to spin up app and test/postgres containers

Things to Note:

• I followed a similar setup to metaslurp project
• Included $curlinside the RUN apt-get update for any transfer of data but not sure if this is actually needed

Reproduce this image build by running:

$docker build -t book-tracker-tests:latest -f docker/book-tracker-test/Dockerfile .

Reproduce the container builds by running:

$docker compose -f docker-compose.yml -f docker-compose.test.yml up --build

[gaurijo]

Tests are now running in Docker and this PR is ready for review @adolski